3816742643945 has 32 divisors (see below), whose sum is σ = 5724205251840. Its totient is φ = 2373450762240.

The previous prime is 3816742643939. The next prime is 3816742643951. The reversal of 3816742643945 is 5493462476183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3816742643939) and next prime (3816742643951).

It is not a de Polignac number, because 3816742643945 - 2⁸ = 3816742643689 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11961872 + ... + 12276801.

It is an arithmetic number, because the mean of its divisors is an integer number (178881414120).

Almost surely, 2^{3816742643945} is an apocalyptic number.

3816742643945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3816742643945 is a deficient number, since it is larger than the sum of its proper divisors (1907462607895).

3816742643945 is a wasteful number, since it uses less digits than its factorization.

3816742643945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24239105.

The product of its digits is 104509440, while the sum is 62.

The spelling of 3816742643945 in words is "three trillion, eight hundred sixteen billion, seven hundred forty-two million, six hundred forty-three thousand, nine hundred forty-five".